A Family of Styrylcoumarins: Synthesis, Spectroscopic, Photophysical and Photochemical Properties

Abstract

Photochromism, which is the reversible transformation between two molecular forms with different absorption spectra, resulting from photoirradiation, has applicability in several fields, including light modulation materials, optical recording materials, optical switches and photochromic inks.[1] The switching from one molecular state to another is dependent upon the efficiency of light absorption by the input chromophore and its ability to undergo a photochemical reaction. Coumarins are an old class of compounds that naturally occur in several plant families.